The qualities of the goods sold by auction are______.

A．is going through a fundamental change
B．has been getting warmer for 10 000 years
C．will eventually change from hot to cold
D．has gone through periodical changes

A．human activities have accelerated changes of Earth's environment
B．Earth's environment will remain mild despite human interference
C．Earth's climate is bound to change significantly in the future
D．Earth's climate is unlikely to undergo substantial changes in the future